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US 4,712,596 AGranted
Lumber surfacing machine
OwnerTom McClaraninventor
Life of this patent
Estimating the term…
Abstract
A lumber surfacing machine for roughening the surface of at least one face of a length of lumber. The machine utilizes a driven band saw blade which is maintained by a pair of blade guides at an acute angle to the surface of the lumber to be roughened. Additional lumber surfacing blades comprising circular saws may be used in conjunction with the band saw blade. The circular saws are mounted at a small angle with respect to the surface which they are roughening.
Claims18
A lumber surfacing machine for roughening the surface of at least one face of a length of lumber, said machine comprising:
- a frame including a lumber-supporting bed, said lumber-supporting bed having a longitudinal axis which is parallel to the direction in which lumber is moved along said bed and said frame being positionable adjacent lumber feeding means for feeding lumber to the machine;
- a first saw wheel supported by said frame on one side of the lumber-supporting bed;
- a second saw wheel supported by said frame on the opposite side of the lumber-supporting bed as the first saw wheel, at least one of said saw wheels being a driven wheel;
- a band saw blade having teeth along a cutting side and having a smooth side, said blade being held around half of the first saw wheel and held around half of the second saw wheel;
- first and second blade guides held by said frame, the first blade guide being on the same side of the lumber-supporting bed as the first saw wheel and the second blade guide being on the same side of the lumber-supporting bed as the second saw wheel, and each of the blade guides having a flat outer surface including a blade-supporting ridge extending above the flat outer surface so that the blade guides have a ridge edge and a flat edge, and the band saw blade being held against the flat outer surface so that its smooth side abuts each ridge, and each of said blade guides being parallel to one another and being supported so that an acute angle is formed between the flat surface and the longitudinal axis of the lumber-supporting bed, said acute angle having its apex at the smooth edge of the flat surface of either of the blade guides and said guides being positioned so that said band saw blade has a cutting length between the guides which is adjacent the lumber-supporting bed and perpendicular to the longitudinal axis of the bed;
- and
- opposing guide means held by said frame and said opposing guide means having a guide surface parallel to the cutting length so that lumber fed into the machine will have one surface held against the guide means and the opposite surface held against the teeth of the band saw and roughened by the teeth thereof.
4 more elements
A lumber surfacing machine for roughening the surface of at least one face of a length of lumber, said machine comprising:
- a frame including a generally horizontal lumber-supporting bed, said lumber-supporting bed having a longitudinal axis which is parallel to the direction in which lumber is moved along said bed and said frame being positionable adjacent lumber feeding means for feeding lumber to the machine;
- a lower circular saw blade mounted on said frame at an angle of between one degree and ten degrees with respect to the longitudinal axis of said lumber-supporting bed and the blade is mounted so that any unit of the lumber passing by said circular saw blade contacts the teeth of the blade after it has passed over the center of the blade, said lower circular saw blade being positioned so that its teeth extend only slightly above the surface of the lumber-supporting bed;
- and
- an upper circular saw blade mounted on said frame at an angle of between one degree and ten degrees with respect to the longitudinal axis of said lumber-supporting bed and the blade is mounted so that any unit of the lumber passing by said circular saw blade contacts the teeth of the blade after it has passed under the center of the blade and said upper circular blade being movably mounted on a vertically movable trolley, said trolley being supported by chain means.
1 more element
A lumber surfacing machine for roughening the surface of at least one face of a length of lumber, said machine comprising:
- a frame including a generally horizontal lumber-supporting bed, said lumber-supporting bed having a longitudinal axis which is parallel to the direction in which lumber is moved along said bed and said frame being positionable adjacent lumber feeding means for feeding lumber to the machine;
- an upper saw wheel supported by said frame above the lumber-supporting bed;
- a lower saw wheel supported by said frame below the lumber-supporting bed, at least one of said saw wheels being a driven wheel and both of said saw wheels having an axis of rotation which is parallel to the longitudinal axis of the lumber-supporting bed;
- a band saw blade having teeth along its cutting side and having a smooth side, said blade being held over the top half of the upper saw wheel and held around the lower half of the lower saw wheel;
- upper and lower blade guides held by said frame, the upper blade guide being above the lumber-supporting bed and the lower blade guide being below the lumber-supporting bed and each of the blade guides having a flat outer surface including a blade-supporting ridge extending above the flat outer surface so that the blade guides have a ridge edge and a flat edge and the band saw blade being held against the flat outer surface so that its smooth said abuts each ridge and each of said blade guides being parallel to one another and being supported so that an acute angle is formed between the flat surface and the longitudinal axis of the lumber-supporting bed, said acute angle having its apex at the smooth edge of the flat surface and said guides being positioned so that said band saw blade has a cutting length between the guides which is adjacent the lumber-supporting bed and perpendicular to the longitudinal axis of the bed;
- and
- opposing guide means held by said frame and said opposing guide means having a guide surface parallel to the cutting length so that lumber fed into the machine will have one surface held against the guide means and the opposite surface held against the teeth of the band saw and roughened by the teeth thereof.
4 more elements
Dependencies are inferred from the claim text.